Dr. Weinschenk’s book systematically goes through categories of important design considerations:

How People See

How People Read

How People Remember

How People Think

How People Focus Their Attention

What Motivates People

People Are Social Animals

How People Feel

People Make Mistakes

How People Decide

Under each category are important points, described, buttressed by research, and boiled down into useful guidelines. This includes much of the research I talk about when I discuss deeper Instructional Design, and more. While it’s written for UI designers mostly, it’s extremely relevant to learning design as well. And it’s easy reading and reference, illustrated and to-the-point.

There are some really definitive books that people who design for people need to have read or have to hand. This fits into the latter category as does Dirksen’s book, while Don Norman’s books, e.g. Design of Everyday Thingsfit into the former. Must knows and must haves.